Water-closet valve



arena Oriana.

TIMOTHY MOHUGH, OF BOSTON, MASSACHUSETTS.

WATER-CLOSET VALVE.

SPECIFICATION forming part of Letters Patent No- 3923741, dated November 13, 1888.

Application filed February 4, 1888. Serial No. 263,031. (No inodelil To aZZ whom it may concern.-

Be it known that I, TIMOTHY MOH'UGH, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Water-Closet Valves, of which the following is a specification.

This invention relates to a water-closet valve which in closing is retarded at the last part of its movement, so that it closes slowly and per mits a slow discharge of water into the pipes after the main or flushing discharge of water.

The invention consists in the improved construction of valves of this class, which I will now proceed to describe and claim.

Of the accompanying drawings, forming part of this specification, Figure 1 represents a sectional view of my improved valve, showing the same open. Fig. 2 represents a similar View, the valve being closed.

The same letters of reference indicate the same parts in both figures.

In the drawingaa represents the valve-seat, whichis formed on the upper end of the discharge-pipe Z), the latter being secured in any 2 5 suitable manner to the bottom (I of a watercloset supply-tank.

e represents the valve, which is formed to cover the seat a, and thus close the dischargepipe. Said valve is attached to a rod, fiwhich is adapted to slide in an orifice in the bottom of a cup, The rod is provided at its lower end with a rounded enlargement, 4, which enters a socket formed in the valve, said socket fitting the enlargcment isomewhat loosely, so that the valve can tip slightly on the rod, and thus conform accurately to theseat a. A frame or cage, h, secured to the discharge-pipe b,supports the cup 9, said cage being formed to permit the free passage of water from the tank through it into the discharge-pipe when the valve 6 is raised.

i represents an enlargement or piston on the rod f within the cup 9, said piston fitting the interior of the cup, so that it gan rise and fall therein, and when falling will permit the water below it to pass slowly upward between it and the wall of the cup. The rod is provided above said piston with an enlargement, e", to give the required Weight to the valve.

tion, is a nipple, it, having a screw-threaded orifice, m, extending longitudinally through it, and a lateral orifice, Z, through one side communicating with said threaded orifice, so that water may escape from the cup when said orifices on. and Z are unobstructed. A screw, 0, fitted in the threaded orifice m, may be ad justed to cover the orifice Z, and thus prevent" the escape of water through the nipple 7a or to uncover the said orifice to any desired extent, and thus permit water to escape with any desired rapidity within the capacity of the orilice I. In. the bottom of the cup 9 is an orifice, 9', covered by a dewnwardly-closing valve, 8, which yields to permit water to pass upwardly through the orifice r into the cup when the piston i is being raised, but closes when the piston is descending.

It will be seen that when the valve is raised to permit the discharge of water from the tank the cup 9 will be filled below the piston by water drawn upwardly through the orifice 0. When the valve is released, it descends by gravitation, the water escaping through the nipple 7; as fast as the adjustment of the screw 0 will permit until the piston passes below the nipple 1:, after which the descent of the piston and valve is retarded, its motion being only such as is permitted by the passage of the confined. water between the piston and. the wall of 80 the cup. The piston has a tolerabl y close fit in the cup, so that its descent after passing the nipple k is very slow.

The valve e is formed with a downwardlyprojecting flange or body, 2, within the packing ring or gasket 3, that comes in contact with the valve seat. Said. flange, when the piston i has passed below the nipple 7c, stands within and nearly fills the discharge-opening surrounded by the valve-seat, only a narrow annular space being left between said flange and the valve-seat for the escape of water into the discharge-pipe. It will be seen that the discharge of water from the tank is greatly reduced at the same time that the closing movement of the valve is retarded. The water therefore escapes rapidly through the discharge-pipe until the valve is nearly closed, and is then partially cut off and flows with a 50 In one side of the cup g, near its lower por greatlydiminished volume until the valve roe reaches its seat, the diminished flow of water being suffieient to fill the trap of the watercloset. If the rapid washing how of water were suddenly and entirely stopped, the trap would be likely to be emptied by siphonage. Thisdifficulty is entirely overcome by the diminished flow, while the retardation of the closing movement of the valve prevents the seating of the valve from being attended by any concussion or hammering, such as is caused by the piston-like action of the escapiug water down the dischargepipe when the Water is suddenly shutoff. An air-pipe, p, is sometimes used to prevent such concussion or hammering by admitting air to the dischargepipe below the valve-seat; but in valves in which the full flow of water is shut off abruptly the air rushes in violently through the air-pipe and causes a roaring sound, which is avoided by my improvement.

It will be observed that the screw 0 enables the duration of the full flow from the valve to be increased or diminished.

The cup 9 being rigidly supported by the cage h over the valve, its bottom constitutes a fixed guide for the valve-stem, said guide, with the inner surface of the cup and the piston moving in said cup, insuring the true vertical movements of the valve and preventing the latter from becoming displaced, so that its flange 2 cannot properly enter the valve-seat. The top of the cage, which is also the bottom of the cup, prevents the valve from being removed.

I claim- In a water-closet valve, the combination of the valve-seat, the frame or cage h, secured to the valve -seat, the valve having the downwardlyprojeeting flange or body formed to partially close the discharge-opening before the valve reaches its seat, the cup 9, supported by the cage over the valve, and having a guide for the stem of the valve and a valved opening, 1',

in its bottom, and a lateral discharge-opening between its bottom and top, an adj usting-screw for said discharge-opening, and the valve-stem passing through the cup and provided Within the latter with a piston, all arranged and operating substantially as set forth.

In testimony WhereofI have signed my name to this specification, in the presence o two subscribing witnesses, this 26th day of January, A. D. 1888.

TIMOTHY MOHUGH.

\Vitnesses:

O. F. BROWN, A. D. HARRISON. 

